I think that, being part of a duo, the getting two songs is much appreciated but a couple of our local clubs do two songs per round per individual meaning that a duo could claim the right to do four.

In these circumstances I'll normally waive my individual turn(s) as otherwise the whole thing becomes interminable and the session can lose momentum if you come to a not so good individual who chooses to do longish songs.

Just one song per individual is more likely to keep momentum going and not cause too much of the session to drag.